Heating fan



FIG. 1 is a front perspective view of the heating fan;

FIG. 2 is a top plan view of the heating fan;

FIG. 3 is a bottom plan view of the heating fan;

FIG. 4 is a front elevational view of the heating fan;

FIG. 5 is a rear elevational view of the heating fan;

FIG. 6 is a left side elevational view of the heating fan; and,

FIG. 7 is a right side elevational view of the heating fan.

The portions of the design shown in broken lines form no part of the claimed design. 

I claim the ornamental design for the heating fan, as shown and described. 